Quantitative Evaluation of Selenium Contained in Tea by High Performance Liquid Chromatography.

Evaluation of Nutritional Availability and Anti-Tumor Activity of Selenium Contained in Selenium-EnrichedKaiwareRadish Sprouts

“…28) Up to 1 g of the diets or sprouts was carefully digested with 10 ml of nitric acid for 30 min. After that, the mixture was further digested with 5 ml of perchloric acid until the appearance of white fumes of perchloric acid.…”

Analytical Problems in Separation of Selenomethionine and Its Oxidative Product in HILIC HPLC

“…Owing to traditional consumption of green tea infused in hot water, the total content of selenium was determined in water extracts of the studied teas. Hot water, buffered solution or HCl-alcohol mixtures extract only low molecular weight selenium compounds as free non-protein bounded selenoamino acids [ 36 ]. The obtained results are presented in Table 1 .…”

Ultrasound assisted-hollow fibre liquid-phase microextraction for the determination of selenium in vegetable and fruit samples by using GF-AAS

“…The most common methods to determine selenium in various samples are UV-visible spectrophotometry (Arikan, Tuncay, & Apak, 1996;Johansson, Andersson, & Olin, 1995), high performance liquid chromatography (Hawkes & Kutnink, 1996;Yoshida et al, 2001), hydride generation atomic absorption spectrometry (Schloske, Waldner, & Marx, 2002;Zhang & Adeloju, 2008), atomic absorption spectrometry (Bidari, Jahromi, Assadi, & Hosseini, 2007;Saygi, Melek, Tuzen, & Soylak, 2007;, hydride generation atomic fluorescence spectrometry (Mazej, Falnoga, Veber, & Stibilj, 2006), and inductively coupled plasma mass spectrometry (Montes-Bayon, Diaz-Molet, Gonzalez, & Sanz-Medel, 2006 also requires large amounts of toxic organic solvents (Marczenko, 1986;Psillakis & Kalogerakis, 2003). Solid phase microextraction (SPME) is a solvent-free sample preparation technique and has been developed for pretreatment of various samples.…”